In June 2022, Dutch military intelligence officials notified the CIA that a Ukrainian sabotage team was seeking a yacht on the Baltic coastline to be used by a team of divers to plant explosives along the pipelines, the report claim. The tip prompted the CIA to deliver a message to Ukraine warning against the sabotage.
The message was delivered despite doubts the CIA had about Ukraine's ability to carry out such an attack, which involved planting explosives deep underwater, the report added.
State Department spokesperson Matthew Miller on Tuesday declined to comment on the report.
"We're not going to comment on private diplomatic conversations that we have with Ukrainian officials with respect to the underlying question," Miller said when asked to confirm the reports about the United States allegedly warning Ukraine.
Miller explained that this matter is under investigation by a number of European governments and the United States will wait for the outcome of those investigations.
The Nord Stream 1 and 2 gas pipelines were built to deliver gas under the Baltic Sea from Russia to Germany. The pipelines were incapacitated by explosive devices in September 2022.
US investigative journalist Seymour Hersh has detailed the US government’s involvement in planning and carrying out the attack on the pipelines based on information from a government source. Ukraine has denied any involvement in the attack.